Support self.* references in provisioner, connection and lifecycle blocks

[radeksimko]

Background

Terraform supports self. references within provisioner and connection resource blocks, such as

resource "aws_instance" "web" {
  # ...

  provisioner "local-exec" {
    command = "echo The server's IP address is ${self.private_ip}"
  }
}

https://www.terraform.io/language/expressions/references#block-local-values
https://www.terraform.io/language/resources/provisioners/syntax

We don't provide any kind of support for these references and if we were to do any kind of thorough validation of them we'd probably flag them as invalid today.

UX Implications

Completion

Hover

Semantic Highlighting

Proposal

• hashicorp/hcl-lang
  • Introduce BodyExtensions{SelfRefs bool} into schema.BodySchema
  • Reflect SelfRefs in decoder.PathDecoder.CandidatesAtPos()
  • Reflect SelfRefs in decoder.PathDecoder.HoverAtPos()
  • Reflect SelfRefs in decoder.PathDecoder.SemanticTokensInFile()
• hashicorp/terraform-schema
  • Add BodyExtensions{SelfRefs: true} to provisioner and connection block bodies
• hashicorp/terraform-ls
  • bump terraform-schema & hcl-lang

[github-actions]

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